The 2008 Jeep Liberty is available as a 4-door, 5-seat sport utility. Starting at $25,030, the 2008 Jeep Liberty Limited Edition 4x2 is powered by a 3.7L , 6 -cylinder engine mated to an automatic transmission that returns an EPA estimated 16-mpg in the city and 22-mpg on the highway. The top of the line 2008JeepLibertySport 4x4 , priced at $ 22,700 , is powered by a 3.7L , 6 - cylinder engine mated to a manual transmission that returns an EPA estimated 16-mpg in the city and 22-mpg on the highway.